Solar Flare WatchHome › Flare history › Region ranking
Solar flares from active region 6878
C4
M3
X0
LargestM6.61991-10-14
Span4 days
Flares by day
1
5
1
All flares
| Date | Begin | Peak | Min | Class | Location | Region |
|---|---|---|---|---|---|---|
| 1991-10-14 | 17:34 | 17:39 | 75 | M6.6 | S24E34 | 6878 |
| 1991-10-15 | 01:19 | 01:30 | 37 | M1.3 | S20E22 | 6878 |
| 1991-10-15 | 07:00 | 07:04 | 70 | M1.4 | S23E30 | 6878 |
| 1991-10-15 | 11:27 | 11:29 | 16 | C4.0 | S23E28 | 6878 |
| 1991-10-15 | 14:52 | 14:54 | 19 | C2.1 | S24E25 | 6878 |
| 1991-10-15 | 15:45 | 15:48 | 20 | C6.3 | S24E24 | 6878 |
| 1991-10-17 | 16:49 | 16:49 | 13 | C1.0 | S24W01 | 6878 |
All times UTC. Until June 2017 classes are NOAA's reports of the time (GOES-15 and earlier included a 0.7 scaling factor); later classes come from calibrated GOES-16/18 data, so the same flare reads about 1.4× larger. Do not compare the two periods directly.
About this page
NOAA active region 6878 produced 7 C+ flares between 1991-10-14 and 1991-10-17.